Recent content by Toftarn

Okay, I figured it out. It turns out the problem was that the magnetic field inside the solenoid was not given by that expression for B, but was actually given by a rather intricate expression with bessel functions and such. Anyway, here is a link to an article discussing just this, if...

Hello! I am making som calculations on induction heating of a metallic cylinder inside a solenoid through which an AC current passes, but the answer I get seems to be completely unrealistic (10 kW with a 50 Hz, 5 Amps, 230 V rms), but I can't seem to find my mistake. What I think is...

I'm not entirely sure, but I think such equations must be solved with a numerical method, such as Newton-Rhapson.

I see. So in the example with the two astronauts, whose clock will tick faster depends on the frame of reference you choose, and to both of them it will look as if the other astronaut's clock ticks slower? And in the case with a spaceship traveling near c, the astronauts will age less not...

I have just started studying special relativity, and there is one thing I really don't understand: Suppose you have two observers, A and B, in space, and that these are moving relative to one another. Due to time dilation, their clocks will tick at different rates. But how do you know whose...

Try dividing both sides of the equation by D.

Use conservation of momentum on the first one. If they are both at rest at the beginning, and the student starts walking, then the boat will get a momentum that is exactly as large as the student's, but in the opposite direction (inverted signs). As for the second one, I'm not really sure...

I see. Every other even number must be evenly divisible by 4. Thanks for the help. And, by the way, I managed to solve the second problem.

Problem 1 Homework Statement Prove that p^2 - 1, where p is a prime greater than 3, is evenly divisible by 24.Homework Equations The Attempt at a Solution p^2 - 1 can be written as (p+1)(p-1) Since p is a prime, (p+1) and (p-1) must both be even numbers. Since every third integer is divisible...